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Subject:	Re: IPC-SM-782 VS IPC-7351
From:	Matthew Lamkin <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Fri, 29 Jul 2005 14:32:16 +0100
Content-Type:	text/plain
Parts/Attachments:	text/plain (56 lines)

And does this necessarily make any board that has been designed to the IPC-SM-782A specs wrong/old technology/bad etc?

Most likely not, but I'm sure that Nick will be able to answer your question.

Matthew Lamkin.
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of Rich
Schutz
Sent: Friday, July 29, 2005 2:28 PM
To: [log in to unmask]
Subject: [DC] IPC-SM-782 VS IPC-7351


We have been using IPC-SM-782 specs for years and have no problems. We
request that are customers use the IPC-SM-782 specs when designing there
PCBS. Some questions have come up in regards to the IPC-7351 specs, which
some of our customers are  using for there designs. We typically review the
chip components on all of the boards we manufacture, in doing so I came
across an issue where the chip components specs have changed between the
IPC-782 and IPC-7351. My questions are:

1). Have the IPC-7351 specs replaced the IPC-SM-782 specs?

2). Which spec should we be designing to?

3). Why have the specs changed?

4). Are the IPC-7351 Specs incorrect?


Rich Schutz
CAD Engineer
Phone: 440-358-5217
Fax: 440-358-5201
Apsco, Inc
3700 Lane Road
Perry, Ohio 44081

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